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The variation of pressure with the volume of the gas at different temperatures can be graphically represented as shown in Fig. 5.3. Based on this graph answer the following questions.

(i) How will the volume of a gas change if its pressure is increased at constant temperature?

(ii) At constant pressure, how will the volume of a gas change if the temperature is increased from 200K to 400K?

Answers (1)

(i) According to Boyle's law,  The pressure of gas \alpha 1/volume of gas, at a constant temperature.

Therefore, if volume decreases at a constant temperature, the pressure increases and vice versa. For example, at 200K if pressure increases from p1 to p2, volume decreases from v­1 to v2(v2 < v1)

(ii) According to Charles's law, The volume of gas α temperature, at constant pressure.Therefore, if the temperature decreases from 200K to 400K, at a constant temperature, the volume of gas increases.

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